Heating element for vulcanizing patches



Aug. 13, 1940.

F. M. pEuTscH HEATING ELEMENT FOR VULCANIZING PATCHES Originai Filed Dec. 28, 19:56

Patented Aug. 13,1940

um'rmo marsnemmm aarm; cxecutrzxo. girl: 1!. sisncr r ducts.

a mnae.

'l'enmac l'poraticn swimmroa Ivuwanmo rams I'snyDcstsch,

mum December um: App Renewed 165-18301 C's Claims. ill.

This invention relates to a novel structure of heat producing element for a vulcanizing patch. It has been common practice for a great maiiy years to repair punctures in innertubes of pneumatic' tires by vulcanizinga patch of rubber over the puncture to completely cover the same, the vulcanizing of the rubber patch upon thetubc providing a substan integral join der of the ,r 10 The patch has-been'carried at the bottom of a sheetmetal, pan, adhering thereto. Within the pan a diskorwaferoffuel which isthoroushly combustible is located, and this fuel when lsniwd burns for an appreeiableperiod of time, furnishingjhe heat required to vulc'anize the patch to the tire. Of-colilse, the-vul anizing of a rubberpatch to a rubber bodyother than inner tubes may be" readily accomplished in the same manner or,other. article which is to have a patch vulcanized thereon upon a suitable rigid iiat sup-- port, place the pan with the fuel disk thereon and with the rubber patch attached at the underside of the pan over the puncture andclamp the panin place, thereby pressing the patch snfig y ainst the n to be repaired and ignite the fuel disk while the parts are in clamped quickly ignites and throughout its entire very ,higli temperature because of the heat de veloped which lasts for the required time, generally approximating five minutes, for obtaining theproper vulcanization of the patch to the tire. My invention is directed to the, fueldisk and is concerned with-a novel becomes a glowing "coal character, may be more ready satura on of the disk and for supplying it with air for combustion, a means for readily securing a considerable portion of a lighting fuse,

\ whereby the fuse is attached to the fuel disk in- 55 "*stantly and without the use of any separate at- 4 w fonthe plane of the Theusualprocessistosupporttheiiinertubo;

rubber tube or otherarticle position, The fuel very a This furnishes a f ceived within the structure by means of whichthe which originaliyis 01' a'dry impregnated with a solution portions or the;

provide the means used for getting the quick and means, and whereby a part of the body of the fuse is located within the body of the disk and the other part projects above it to be readily shted.

For. an understanding of the invention for the attainment of the objects stated, as well as others not enumerated at this time, reference may be had to the following description, taken in connection with the accompanying. drawing, in

Pig. 1 is a perspective view illustrating the in which a rubber article such as an er tube, is repaired by vulcanizing a patch thereon. v r 1'13. 2 is a perspective view of the patch unit the novel fuel disk of my inveniised incl Hg. 3 is a longitudinalsection substantially brokenline H of Fig; 2..

Hkereferencecharactersrefertolikepartsin' 'thedifl'erentilguresofthedra f a The fuel disk or wafer is held within a pan of thin sheet metal which maybe of, oval shape as shown, oranyother fabriccovering [which 'from'the patch when place. V 7

' Hie fuel disk U is ay bereadily stripped the vulcanizing 151:0 take 7 of a shape so as t'o berevertical sides 2 of the pan and a thickness slightly less than V 881G sides. This diskusually is made froma porous fiber or paper board andwls impregnated with a solutionofnreadily combus- 'tible all or which is well known: to those-skilledsinthisart.

With my inventions plurality of spaced apart v r ic madeihrcuch the disk 5." There are shown four vertical openings'B ,which' in the drawing 'are located substantiallyoii. the major and minor axes of theellipticali disk and located in adistance from the peripheral In addition there is an elongated n w-slot I located preferably diagonally withcrespect to 'the major axis of the disk orfat' a position approximating .an angle of 45-to .both jthe major and minor axes of the disk It is, of course, to be underthat the particular location and positioning .otthc is not itself an essential feature J6 is preferably'of the he'ight of in the form v ranged in a great many different ways.

Within the diagonal slot 1, after the disk has been treated with the solution of combustible materials a fuse 8 is inserted at one end. The width of the slot 1 is such that the end portion of the fuse which is inserted in the slot has to be contracted and squeezed therein so that the fuse is held by the grip against it made by the sides of the slot 1.

In producing the disk 5 it is cut from the stock of fiber or paper board material such as is used in the form desired, and either at the same time or at a subsequent time the holes I are cut entirely through the disks. The disks are submerged in a solution of the highly combustible materials which are used to saturate the disks. Such solution entering the openings 6 and slot 1 as'well as covering both the upper and lower sides of the disk and surrounding its peripheral edges, there is complete assurance that the whole body of the d' k will be wholly saturated and impregnated with the solution. The disks are then dried and the igniting fuse 8 inserted at one end portion in the slot 1.

In using the vulcanizing unit for repairing a rubber inner tube, a clamp having a U-shaped body 9' with upper and lower arms is ordinarily used, the lower arm terminating in a table, indicated at ID, on which the article to be repaired by vulcanizing a patch thereto is placed. The vulcanizing unit is then placed over the puncture or opening in the tire which. is to be repaired, having first'removed the fabric at l. The upper arm of the body 9 is vertically threaded at its end for the reception of a threaded thumb screw II which at its lower end carries a spider l2, usually with four arms as shown, which bear upon the upper edges of the sides 2 of the pan, opposed arms lying substantially over the major axis of the elliptical pan and the other two men the minor This brings the free end of the fuse 8 between two of the arms of the spider so as to be very accessible for lighting. If the pan and the disk therein are of a circular shape then it is desirable to .locate the pan in a position such that the free en of the fuse will likewise lie between two of the arms ofthe clamping spider.

Lighting the fuse causes the fuse to burn and carries the fire into the slot 1 so as to ignite the fuel disk at many points in the length of the slot between the upper and lower sides of the disk. The combustible composition with which the disk is saturated includes oxygen producing elements in the presence of heat so that theoretically the entire mass of the disk in a very short time should be completely ignited and burn as a glowing coal. However, it has been found in practice that even though the oxygen produced by part of the ingredients with saturated may sufllce to get the wafer completely ignited throughout, there is frequentlywholly 111-- 6 and the slottwo of the.

which the disk is,

of this invention as the openings may be arsuflicient oxygenfor combustion after complete ignition has taken place whereby there is incomplete combustion, smoking and loss of heat and temperature to the detriment of the vulcanizing process. The openings 6 and the slot I furnish a plurality of means for the passage of air to various parts of the burning fuel disk and thus supply any necessary added amount of oxygen required to complete the combustion of the fuel disk and reduce the same to ash, with a minimum of incomplete combustion losses of heat and temperature or the production of low temperature at parts of the disk, and further reduces smoking and other usual effects of incomplete combustion.

In practice the fuel disk after it has been completely impregnated with the combustible solution is of a red color. The fuse 8 being of a white color there is produced a very distinctive and characteristic appearance.

This invention and improvements upon the fuel disks for vulcanizing units of the character described has. proved very practical and useful for the purposes stated and for which it was designed. The invention is defined in the ap-' pended claims and is to be considered comprehensive of all forms of structure coming within their scope.

I claim:

4 l. A fuel disk of the class described comprising a disk impregnated wit a combustible material, and an elongated fuse in contact with said material over a considerable area substantially in the center thereof, said fuse being frlctionally held in contact with said material.

2. A fuel disk of the class described comprising a disk impregnated with acombustible material, an elongated recess extending substantially across said disk, and an elongated fuse, a portion of which is pressed into said recess and held therein by frictional engagement with the sides thereof, whereby the sides and bottom of said recess will be ignited simultaneously fuse.

3. A fuel disk of the class described comprising a disk impregnated with a combustible material,

an elongated recess extending across said disk in substantially the center thereof, and a fuse having one end portion thereof located in said recess with the other end portion extending above the upper side of the disk, said fuse being frlctionally gripped'and held by the sides of said recess.

4. A fuel disk of the class described'comprising a disk impregnated with a combustible material,

and a fuse frlctionally held in contact with said disk over a considerable area.

5. A fuel disk of the class described comprising a disk impregnated with a combustible material, and a fuse frlctionally held in contact with a considerable portion of the vertical cross-sectional area of said disk.

FRITZ M. DEUTSCH.

by the burning of the 

